Facile Soft-Templated Synthesis of High-Surface Area and Highly Porous Carbon Nitrides,Chemistry of Materials

当前位置： X-MOL 学术 › Chem. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Facile Soft-Templated Synthesis of High-Surface Area and Highly Porous Carbon Nitrides
Chemistry of Materials ( IF 7.2 ) Pub Date : 2017-02-10 00:00:00 , DOI: 10.1021/acs.chemmater.6b03570
Maryam Peer ₁ , Marcella Lusardi ₂ , Klavs F. Jensen _{1,

2}

Affiliation

Mesoporous carbon nitride is synthesized in a one-pot approach using different nonionic surfactants (Pluronic F-127, Pluronic P-123, and Triton X-100) and a melamine cyanurate hydrogen-bonded complex using just water as the solvent. We obtain three-dimensional assembled nanostructures from low-dimensional carbon nitride sheets by taking advantage of supramolecular assembly of melamine and cyanuric acid, moderate interactions between the surfactant and precursors, structure directing effects of the surfactants, and the good thermal stability of the melamine cyanurate sheets formed around the micelles. Different morphologies, including sheetlike, hollow spherical, and tubular or highly porous networks, result depending upon the synthesis approach and the surfactant/precursor ratio. Pseudoternary phase diagrams map the composition of the starting solution to the resultant carbon nitride morphology. Increasing the amount of surfactant leads to a higher carbon residue (C/N ∼ 1) and large BET surface areas (≤300 m²/g). Further tuning of the synthesis parameters as well as addition of HCl produces uniformly porous nanostructures with a high porosity (up to 0.8 cm³/g), a high surface area (>200 m²/g), and yet a stoichiometric C/N ratio (∼0.75). The synthesized high-surface area carbon nitrides show improved light absorption and enhanced photocatalytic activity in a rhodamine B dye degradation reaction under visible light irradiation compared to those of bulk melamine-derived carbon nitride.

中文翻译：

高表面积和高多孔性碳氮化物的简便软模板合成

使用不同的非离子表面活性剂（Pluronic F-127，Pluronic P-123和Triton X-100）和仅使用水作为溶剂的三聚氰胺氰脲酸酯氢键复合物，通过一锅法合成中孔氮化碳。我们利用三聚氰胺和氰尿酸的超分子组装，表面活性剂与前体之间的适度相互作用，表面活性剂的结构导向作用以及三聚氰胺氰尿酸酯的良好热稳定性，从低维氮化碳片材获得了三维组装的纳米结构。胶束周围形成的床单。取决于合成方法和表面活性剂/前体比率，得到包括片状，中空球形，管状或高度多孔网络的不同形态。伪三元相图将起始溶液的组成映射到所得的氮化碳形态。增加表面活性剂的量会导致较高的碳残留量（C / N〜1）和较大的BET表面积（≤300m² / g）。合成参数的进一步调整以及HCl的添加会产生具有高孔隙率（高达0.8 cm ³ / g），高表面积（> 200 m ² / g）和化学计量C / N的均匀多孔纳米结构比（〜0.75）。与散装三聚氰胺衍生的氮化碳相比，在可见光照射下，若丹明B染料降解反应中合成的高表面积氮化碳显示出改善的光吸收和增强的光催化活性。

更新日期：2017-02-10

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南